Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d347cd0fcef581…

MALICIOUS

PDF

42.6 KB Created: 2020-10-05 20:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc9974af191c184364e4cf4a74b4a2bc SHA-1: 84678e6a2052d01267185566ededa9d0ed764752 SHA-256: e4d347cd0fcef581cbe3eaf460a25e0ac04218375d2ae100016a6937d34cffc7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body also contains the URL 'https://gettraff.ru/pify?keyword=can+villagers+climb+ladders', which is likely used to redirect users to a malicious site. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/pify?keyword=can+villagers+climb+ladders In PDF document text
    • http://files.theserenityproject.us/uploads/1/3/1/4/131406365/6188979.pdfIn PDF document text
    • http://files.earthcentered.org/uploads/1/3/1/4/131408432/5120517.pdfIn PDF document text
    • http://libavuxex.willowcreekdevelopment.com/uploads/1/3/0/9/130969577/xisujakoz.pdfIn PDF document text
    • http://vojoze.savsummerartsintensive.com/uploads/1/3/1/4/131483955/8930319.pdfIn PDF document text
    • http://files.dyslexiaadvocacyactiongroup.org/uploads/1/3/1/6/131606727/3260965.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d6e3fa-972b-4211-900d-a3996547f9cf/lujaravurefiwegukubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aadc2b7-7d23-4338-a649-69dc0985f6c5/koxukelagugigutodaxoludox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5a016e-69d2-481c-ae95-d464243f59a4/52330876517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7390315-3f7e-49cb-b5a6-0d8a2d23095d/23997311873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/31412145002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/60542793478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/round_cake_cutting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/long_beach_gas_bill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/dosukexevovazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/how_to_blend_acrylic_paint_sunset.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 5364 bytes
SHA-256: 64ad2be3eb95519f4826a02576d128eb7a9278cf22076522a4ce239de7f999a6
font_01_sfnt_off00007c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 9808 bytes
SHA-256: 52629cb30373d93467ccf8d8298c1d535ec19a8747412c6b656d135eb0f37861

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